#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections.Generic;
using System.Text;
using Newtonsoft.Utilities.Collections;
using Newtonsoft.Utilities.Testing;
using NUnit.Framework;
using Newtonsoft.Utilities.Miscellaneous;

namespace Newtonsoft.Utilities.Tests.Collections
{
  public class MultiComparerTests : TestsBase
  {
    [Test]
    public void DateTimeComparer()
    {
      PropertyComparer<DateTime, int> yearComparer = new PropertyComparer<DateTime, int>(
        delegate(DateTime d) { return d.Year; }
      );

      PropertyComparer<DateTime, int> minuteComparer = new PropertyComparer<DateTime, int>(
        delegate(DateTime d) { return d.Minute; }
      );

      MultiComparer<DateTime> multiComparer = new MultiComparer<DateTime>(new IComparer<DateTime>[] { yearComparer, minuteComparer });

      List<DateTime> test = new List<DateTime>();

      for (int i = 0; i < 100; i++)
      {
        test.Add(RandomUtils.GetDateTime());
      }

      test.Sort(multiComparer);

      for (int i = 0; i < 99; i++)
      {
        DateTime d1 = test[i];
        DateTime d2 = test[i + 1];

        int yearCompare = Comparer<int>.Default.Compare(d1.Year, d2.Year);

        Assert.AreNotEqual(yearCompare, 1);

        if (yearCompare == 0)
          Assert.AreNotEqual(Comparer<int>.Default.Compare(d1.Minute, d2.Minute), 1);
      }
    }
  }
}
